Lengths of two rods are 6 feet and 8 feet. What is the smallest length that can be measured separately using either of the rods?

6 feet

8 feet

A.

6 feet

B.

24 feet

C.

8 feet

D.

14 feet

Sample Question

In a 4x100 m relay race, Emad runs the first 100 metres in XXII seconds. Adela runs the second leg in XV seconds. Jalila runs the 3rd leg in XVIII seconds and Basma runs the final 100 metres in XIX seconds. In how many seconds did they complete the race (in roman numerals)?